Beneficiation method for separating fluorite and tungsten through flotation

Abstract

The invention discloses a beneficiation method for separating fluorite, white tungsten (black tungsten) and gangue minerals in complex polymetallic ore through flotation. Non-magnetic products of tailings subjected to sulphide ore flotation or tailings subjected to sulphide ore flotation and then subjected to strong magnetic separation for recycling black tungsten serve as two kinds of samples. The pH value is controlled by adding regulators, white tungsten, black tungsten, other gangue combined inhibitors and collectors are added, fluorite is subjected to differential flotation, then, tungsten minerals are subjected to flotation, and therefore fluorite and tungsten can be efficiently recycled. Loss of fluorite in tungsten flotation concentrate is avoided when tungsten minerals are subjected to differential flotation, and the defect that when tungsten flotation is performed, fluorite is difficult to recycle through flotation because the inhibitors have strong inhibition on fluorite, and beneficiation efficiency is low is avoided. Compared with a current beneficiation situation, the fluorite recycling rates of tests on the two different samples are increased by 39% to 48 % and 9% respectively, and the tungsten recycling efficiency is improved by 3%.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a calcium-containing gangue such as fluorite, scheelite, calcite, garnet, etc. Mineral separation and comprehensive recovery beneficiation method. Background technique [0002] Fluorite and scheelite have similar surface electrical properties and flotation behavior, so the flotation separation between them is very difficult, and complex polymetallic ores also contain calcium-containing gangue minerals such as calcite, so fluorite and tungsten Flotation separation of calcium-containing gangue minerals such as fluorite and calcite is more difficult, and its separation technology is still the bottleneck restricting the efficient recovery of fluorite and scheelite, and it is one of the worldwide problems in the field of mineral processing. In the past, in the mineral processing recovery production and scientific research of minerals containing fluorite and scheelite, the...

AI Technical Summary

Problems solved by technology

[0004]1) Under the conditions of high alkaline pH value and adding a large amount of water glass, the scheelite is preferentially flotation, and the fluorite is strongly inhibited, so that the subsequent fluorite flotation It becomes extremely difficult; at the same time, in the process of preferential flotation of tungsten, a part of fluorite with better floatability is lost during tungsten flotation, and the recovery rate of fluorite is difficult to improve

[0005]2) When floating tungsten tailings for fluorite flotation, it is necessary to add a large amount of acid and activator to adjust the pH value of the slurry to activate the suppressed fluorite minerals At the same time, some gangue minerals are activated, making it difficult to improve the quality of fluorite flotation concentrate

[0006]3) The process of fluorite beneficiation is complicated, multiple beneficiation is required, and tailings must be discharged twice during the beneficiation process or regrinding of concentrate is required to ensure Fluorite concentrate grade, on-site production beneficiation control is difficult and poor stability

[0007]4) Using tungsten and fluorite mixed flotation, mixed concentrate separation flotation-regrinding and re-election-acid leaching-tungsten gravity recovery and other complex processes

[0008]5) In the existing technology of flotation separation of black and white tungsten and fluorite, a large amount of water glass is added to the mixed flotation of black and white tungsten. The problem of low recovery rate

[0009]After decades of scientific research, the high-efficiency separation technology of fluorite and tungsten has made great progress. In the actual production of high-alkali fluorite beneficiation, the recovery rate of raw ore fluorite still hovers between 26% and 35%, and the grade of fluorite concentrate is 80% to 93%. The recovery rate of scheelite flotation coarse concentrate is 70%